Colour filling and blending

The governing principle is precision near edges. Small, controlled strokes reduce the amount of paint released at one time and allow the artist to follow the boundary carefully, so option A is correct. Excess water increases spreading, rapid dragging reduces control, and folding the paper does not create a clean painted edge. Larger strokes are more suitable for the open central area after the boundary has been secured.

The governing concept is colour purity during blending. Paint left in a dirty brush mixes unintentionally with the new colour, changing its hue and often producing a dull, muddy patch. Washing and gently drying the brush before changing colours keeps the transition clean and controlled. Therefore, option A is correct; brush weight, paper thickness and permanence are unrelated to brush cleanliness.

The governing concept is glazing, a layered painting method in which a thin, transparent or translucent colour is placed over a completely dry underlying layer. The lower colour remains visible and combines optically with the upper layer to create depth or a changed hue. Therefore, option C is correct. Hatching uses lines, stamping uses an impression, and cutting removes material rather than building transparent colour layers.

The governing concept is stability between transparent paint layers. If the first layer is still wet, the moisture and brush movement of the next glaze can dissolve, lift or disturb it, causing unwanted mixing and loss of clean edges. Allowing it to dry preserves the underlying colour and makes the upper layer predictable. Therefore, option D is correct; the other choices have no connection with glazing.

The governing concept of gradation is a continuous, gradual change in colour, value or mixture. When the proportion of the two colours changes abruptly in the middle, the eye detects a sharp boundary instead of a smooth transition, producing a stripe or broken band. Therefore, option B is correct. An even gradation requires small, progressive changes; sudden change does not inherently make the surface shiny or colourless.

The governing concept is modelling form through value and tonal transition. A sphere appears rounded when the chosen light area gradually changes through middle tones into the darker shadow side, with the light direction kept consistent. Therefore, option C is correct. A single dark colour, a thick outline or equal white coverage flattens the form instead of showing volume and curvature.

The governing concept is the vulnerability of wet paper fibres. Water weakens the sheet, and repeated brushing adds friction that can lift, abrade or separate the fibres. The surface may then look rough, fuzzy or damaged and may hold colour unevenly. Therefore, option D is correct. Wet overworking cannot turn paper into metal, rename a colour or shorten the brush.

The governing concept is preliminary colour testing for control and consistency. A small test stroke reveals the actual hue, value, transparency, paint strength and amount of moisture held by the brush before the main area is covered. This allows adjustment without spoiling the shape. Therefore, option A is correct; testing cannot enlarge paper, replace a handle or permanently dry paint.

The governing idea is even paint distribution during colour filling. If the brush pauses in one place while pressure is maintained, more wet colour is released at that point, producing a sudden dark deposit. The white paper, handle length and colour name do not control paint flow. Continuous, light and controlled strokes help keep the tone uniform.

The governing technique is colour lifting, in which a clean, slightly damp brush absorbs or removes unwanted wet paint and makes the area lighter. The brush must be cleaned and blotted repeatedly so that it does not spread the colour elsewhere. Outlining makes edges, stamping transfers marks, and scumbling lays broken colour rather than removing it.

Colour lifting works because a clean damp brush absorbs unwanted paint. If it is not rinsed or blotted, the brush retains the absorbed pigment and can redeposit it on the next area, creating a stain or uneven patch. The paper will not dry instantly, the colour will not always become white, and brush length cannot change through lifting.

The governing principle is consistency of stroke direction, pressure and paint load. When strokes are uneven and change direction randomly, some parts receive more pigment while others receive less, so the filled surface appears patchy and irregular. Such handling does not purify the colour, thicken the paper or automatically balance the composition. Controlled overlapping strokes produce a smoother area.

Gradual blending follows the value-transition principle: small amounts of the light and dark colours are worked toward each other, creating intermediate tones. These middle tones remove a harsh boundary and make the change look smooth and continuous. The method does not change paper size or dry the brush, and careful control should prevent colour from crossing the intended boundary.

In a flat wash, wet paint can collect at a boundary and dry as a darker edge or back-run. The useful corrective principle is to remove the excess while it is still wet, using a clean damp brush and a controlled stroke. Adding water may spread the pool, rubbing can damage the surface, and pausing at the boundary increases accumulation.

Brush selection is governed by the size of the area, the amount of coverage required and the level of detail. A broad brush covers a large background efficiently, while a smaller brush gives control near edges and in fine shapes. Price, the painter’s name and the paper title do not determine suitability. Therefore option A gives the practical basis for selection.

The governing concept is control of colour value and saturation when making a shade. Too much black makes the mixture darker, but it can also dull the brightness and obscure the identity of the original hue, producing a muddy-looking result. It does not automatically make paint transparent or warm, and it cannot change the smoothness of the paper. Black should be added gradually.

The governing concept is colour blending and temperature contrast. When a warm colour gradually merges with a cool colour in a controlled, balanced manner, the viewer can perceive a smooth change in visual temperature, often adding atmosphere, depth, or harmony. Therefore, option A is correct. The other choices concern paper, brush size, or removal of colour, none of which is an effect of colour blending.

The governing concept is visual hierarchy and background control. Very sharp colour changes create strong contrast and visual activity behind the subject, so the eye may be attracted to the background instead of the intended focal point. Thus option B is correct. Such transitions do not physically enlarge the subject, alter paper transparency, or clean a brush; those alternatives are unrelated to composition.

The governing concept is atmospheric perspective: nearby objects are usually shown with stronger tonal contrast and more definite edges than distant objects. Using clear value differences and controlled boundaries makes the foreground appear nearer and sharper. Therefore, option C is correct. Equal lightness, blurred edges everywhere, or leaving the area uncoloured would reduce clarity rather than strengthen it.

The governing concept is atmospheric perspective. As objects appear farther away, artists commonly reduce colour intensity, contrast, and edge sharpness to suggest the effect of air between the viewer and the object. This makes distant forms recede and supports spatial depth, so option D is correct. Softer colour does not make an object heavier, metallic, or the focal subject.

The governing technique is gentle correction while the paint is still wet. A clean, slightly damp brush or tissue can lift excess colour by blotting, allowing the boundary to be restored without spreading the mark. Therefore, option A is correct. Spreading the paint enlarges the error, black paint may create a harsh patch, and hard rubbing can damage the paper surface.

The governing concept is surface preservation during correction. Once paint has dried, aggressive scraping or washing may tear, roughen, or permanently stain the paper. The safer approach is to assess the medium, cover the mark with an appropriate layer if possible, or incorporate it into the composition. Hence option B is correct; the other choices risk damage or do not address the mark.

The governing concept is layered colour application. A completely dry first layer provides a stable base, so the second layer remains cleaner and the two colours do not mix unpredictably. This is why option C is correct. A very wet or flooded base encourages bleeding and unwanted blending, while a scratched surface is damaged and cannot reliably support an even layer.

The governing concept is the wet-on-wet painting method. Because the underlying surface is wet, the new colour moves into it and the boundary loses sharpness, producing a soft, diffused edge. Therefore, option D is correct. A hard, cut, or metallic edge requires different treatment and does not normally result from colour spreading across a wet surface.

The governing concept is wet-on-dry colour application. A dry surface does not readily allow the paint to travel beyond the brushstroke, so careful loading and water control help preserve the intended shape and boundary. Thus option A is correct. Uncontrolled flow and blurred edges are more associated with excess moisture, while paper tearing is not an inevitable result of painting on a dry surface.